[krapp]

>Is it ethical to use that much free software for the corporation's own personal gain?

I don't believe it's necessarily unethical for a corporation to take advantage of open source software if the open source code is distributed with a license which allows for commercial use. I think if the author wants not to care about that, then that should be their right.

That said, closed-source code does make theft a lot easier to hide, so the case is stronger for the use of free software validating the (ethical) integrity of a company.